ISSUE: a PowerPoint presentation with recorded audio does not save the audio when it is reopened anywhere.
RESOLUTION: PowerPoint presentations MUST be saved as .pptx files in order to save recorded audio. PowerPoint will appear to be recording the audio, including placing the speaker icon on the slides, and will save the .ppt file. However, when the .ppt file is reopened, the icon will remain with no audio included. Only saving it as a .pptx file will retain the audio.